X0306 4 2020-06-23 0 0001355790 International Stem Cell CORP ISCO.OB 0001405212 Don Wright C/O INTERNATIONAL STEM CELL CORP. 5950 PRIESTLY DRIVE CARLSBAD CA 92008 1 0 0 0 Stock Option (Right to Buy) 1.08 2020-06-23 4 A 0 46428 0 A 2030-06-23 Common Stock 46428 46428 D Stock Option (Right to Buy) 1.08 2020-06-23 4 A 0 30000 0 A 2030-06-23 Common Stock 30000 30000 D Stock option granted as part of compensation for non-employee directors. Options vest in four equal quarterly increments, with first increment vesting on 9/23/2020. Stock option granted as part of compensation for non-employee directors. Options vest fully at the earlier of (i) June 23, 2021 or (ii) the date of the 2021 Annual Meeting of Stockholders, with vesting accelerated for all shares in the event of a change in control. /s/ Sophia Garnette, Attorney-in-Fact 2020-06-24